Paint the world on the marble you are going to be engraving with a skinny layer of white, drinking water-based paint. This may enable make pencil marks for outlining your engraving easier on you considering that or else, the pencil would just rub off the marble. Along with your laser engraver

Fly's Eye provides a flicker fusion level of 300/s. People Have got a flicker fusion fee of only sixty/s in vibrant light and 24/s in dim light. The flicker fusion amount would be the frequency with which the "flicker" of an image can't be distinguished as somebody party. LE